Ren Master mk1 - cv joint - sawl

Hi All,

the steering on my minibus is moving abruptly to the right when I accelarate. The steering fluid , tyres are fine but the cv joint boot has split and grease spilled out. There's no obvious knocking sound. I asked a breakers for cv joint plus drive shaft, he's got one but said ""driveshaft with wheel straight has 3-5mm play at top of brake disc when holding shaft still. no knocking on both locks. obviously under no load tho. boots are good"" Is it worth getting this second hand one of should I go for new or better condition 2nd hand? Thanks in advance, Matt